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Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 6.
0

%I #7 Feb 15 2025 15:28:59

%S 1,24,1861,168661,16902651,1797062518,199090941069

%N Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1 X 6.

%Y Cf. A112389, A123762 - A123827, A123829 - A123849.

%K nonn,hard,changed

%O 1,2

%A _Søren Eilers_, Oct 29 2006